We analyzed a large, multicenter, retrospective cohort of 368 adult patients with SJS/TEN from the United States. 4 Of 314 patients known to survive to hospital discharge, 150 (47.8%) had information available regarding postdischarge follow-up. Of these, there was no mention of SJS/TEN-related sequelae in 54.7% (82/150), and long-term sequelae were noted in the remaining 45.3% (68/150), characterized as ocular, cutaneous, gastrointestinal, genital, renal, pulmonary, or other. Sequelae were reported to be severe in 15.3% (23/150) of patients (Table I). Ocular sequelae were most common (20.6%, 31/150), followed by cutaneous (19.3%, 29/ 150), genital (5.3%, 8/150), oral (4.0%, 6/150), renal (2.0%, 3/150), and gastrointestinal (0.67%, 1/150). Other sequelae not fitting into these categories included depression, anxiety, chronic pain, tinnitus, and limb amputations.At the time of initial hospitalization, 12.7% (19/ 150) of patients had severe ocular SJS/TEN, and 34.0% (51/150) had severe oral SJS/TEN. Such patients, as well as those with higher median body surface area involvement, were at increased risk of long-term sequelae, including sequelae characterized as severe (all P \ .01). Patients with severe genitourinary SJS/TEN (12.7%, 19/150) were also at risk of severe long-term sequelae (P ¼ .02) (Table I).There was no association between age, sex, or race and the risk of long-term sequelae in this cohort. SJS/TEN cause/trigger and days from symptom onset to hospital admission, dermatology consultation, diagnosis, and drug discontinuation also were not associated with development of SJS/TEN-related sequelae.These data suggest that long-term SJS/TEN-related sequelae are relatively common and frequently severe, corroborating rates of previously reported sequelae in SJS/TEN. Higher acuity of SJS/TEN at the time of initial presentation-specifically, the presence of severe mucosal disease and higher total body surface area involvement-predicts the development of long-term SJS/TEN-related sequelae.This study is limited by its retrospective nature, which obscures a detailed accounting of the specific features of patient sequelae and almost certainly underestimates their prevalence, because information on sequelae was determined via retrospective chart review rather than prospective systematic evaluation and was not available for all patients. Because all patients were managed by dermatology hospitalists at academic referral centers, results may not be fully generalizable. Future studies should prospectively evaluate the longterm sequelae of patients with SJS/TEN as an important marker of disease outcome and treatment efficacy. Clinicians should be aware of the potential for long-term complications among SJS/TEN survivors.